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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Mechanical - 8.1L) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Piston, Connecting Rod, and Bearing Installation >> Piston Installation

Piston Installation

WARNING: This page is about a different variant/trim than selected.
    Fig 1: View Of Rubber Fuel Line And Connecting Rod Bolts
    GM639532Courtesy of GENERAL MOTORS CORP.
  1. Coat the following components with clean engine oil:
    • The piston
    • The piston rings
    • The cylinder bore
    • The bearing surfaces
  2. Install rubber fuel line (1) onto the connecting rod bolts.
    3. Fig 2: Identifying Right Piston And Connecting Rod "Front" Marks
    GM1671492Courtesy of GENERAL MOTORS CORP.
  3. Position the right bank piston and connecting rod assemblies for proper installation. The arrow (1) on the top of the piston should be facing the front of the engine and the master or larger flange (2) of the connecting rod facing rear of engine.
    4. Fig 3: Identifying Left Piston And Connecting Rod "Front" Marks
    GM1671498Courtesy of GENERAL MOTORS CORP.
  4. Position the left bank piston and connecting rod assemblies for proper installation. The arrow (1) on the top of the piston should be facing the front of the engine and the master or larger flange (2) of the connecting rod facing front of engine.
    5. Fig 4: View Of Piston, Connecting Rod, & Connecting Rod Upper Bearing
    GM639536Courtesy of GENERAL MOTORS CORP.
  5. Install the piston, connecting rod and upper connecting rod bearing through the top of the engine block.
    6. Fig 5: Installing Piston & Connecting Rod Assembly Into Engine
    GM5159Courtesy of GENERAL MOTORS CORP.
  6. Install the J 8037  onto the piston and compress the piston rings.
  7. Use the J 8037  and lightly tap the top of the piston with a wooden hammer handle.
  8. Hold the J 8037  firmly against the engine block until all of the piston rings have entered the cylinder bore.
    9. Fig 6: Rubber Fuel Line & Connecting Rod Bolts
    GM639533Courtesy of GENERAL MOTORS CORP.
  9. Use the rubber fuel line (1) in order to guide the connecting rod onto the crankshaft journal.
  10. Remove the rubber fuel line.
    11. Fig 7: View Of Connecting Rod Cap & Connecting Rod Lower Bearing
    GM639084Courtesy of GENERAL MOTORS CORP.
  11. Install the connecting rod cap and lower connecting rod bearing.
    12. NOTE: Refer to Fastener Notice in Cautions and Notices.
    IMPORTANT: When installing the piston and connecting rod assembly, NEW connecting rod nuts must be installed.
  12. Install the NEW connecting rod nuts.

    Tighten: 

    1. Tighten the connecting rod nuts a first pass to 30 N.m (22 lb ft).
    2. Tighten the connecting rod nuts a final pass an additional 90 degrees using the J 45059  .

    13. Fig 8: Measuring Connecting Rod Side Clearance Using J 7872
    GM677801Courtesy of GENERAL MOTORS CORP.
  13. Once the piston and connecting rod assemblies have been installed, lightly tap each connecting rod assembly, parallel to the crankpin, in order to make sure that they have side clearance.
  14. Use a feeler gage or a dial indicator to measure the side clearance between the connecting rod caps. The rod side clearance should be 0.384-0.686 mm (0.0151-0.0270 in).
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